This is a simple electromatic levitation device based on a great DIY 3D print video here on Youtube..
Here is the DIY 3D vtideo that I used as a guide to build my device.: https://www.youtube.com/watch?v=ZVqwXtX0-DU&t=296s
Here is the same basic project that I built 6 years ago and shows the circuit diagram. The new circuit eliminated even the 1N4007 diode. https://www.youtube.com/watch?v=XW9I_5E0HuM&t=228s